Assist for orienting a camera at different zoom levels

ABSTRACT

Aspects of the present disclosure relate to systems and methods for assisting in positioning a camera at different zoom levels. An example device may include a memory configured to store image data. The example device may further include a processor in communication with the memory, the processor being configured to process a first image stream associated with a scene, independently process a second image stream associated with a spatial portion of the scene wherein the second image stream is different from the first image stream, output the processed first image stream, and output during output of the processed first image stream a visual indication that indicates the spatial portion associated with the second image stream.

CLAIM OF PRIORITY UNDER 35 U.S.C. § 120

The present application for patent is a continuation of patentapplication Ser. No. 16/851,306 entitled, “ASSIST FOR ORIENTING A CAMERAAT DIFFERENT ZOOM LEVELS” filed Apr. 17, 2020, currently pending, whichis a continuation of patent application Ser. No. 15/701,293 entitled,“ASSIST FOR ORIENTING A CAMERA AT DIFFERENT ZOOM LEVELS” filed Sep. 11,2017, and assigned to the assignee hereof and hereby expresslyincorporated by reference herein.

TECHNICAL FIELD

This disclosure relates generally to systems for image capture devices,and specifically to positioning a camera for recording images or video.

BACKGROUND OF RELATED ART

Many devices and systems (such as smartphones, tablets, digital cameras,security systems, computers, and so on) include cameras for variousapplications. For many camera systems, when taking images or recordingvideo, a display for the camera (such as a smartphone or tablet display)previews images or video being captured by the camera. For example, if acamera zooms in while taking pictures or recording video, the displayshows the zoomed in view (which is what is being recorded using thecamera).

SUMMARY

This Summary is provided to introduce in a simplified form a selectionof concepts that are further described below in the DetailedDescription. This Summary is not intended to identify key features oressential features of the claimed subject matter, nor is it intended tolimit the scope of the claimed subject matter.

Aspects of the present disclosure relate to assisting in positioning acamera at different zoom levels. In some implementations, an exampledevice may include a memory configured to store image data. The exampledevice may further include a processor in communication with the memory,the processor being configured to: process a first image streamassociated with a scene; independently process a second image streamassociated with a spatial portion of the scene, wherein the second imagestream is different from the first image stream; output the processedfirst image stream; and output, during output of the processed firstimage stream, a visual indication that indicates the spatial portionassociated with the second image stream.

In another example, a method is disclosed. The example method includesprocessing, by a processor, a first image stream associated with ascene; independently processing, by the processor, a second image streamassociated with a spatial portion of the scene, wherein the second imagestream is different from the first image stream; outputting theprocessed first image stream; and outputting, during the output of theprocessed first image stream, a visual indication that indicates thespatial portion associated with the second image stream.

In another example, a non-transitory computer-readable medium isdisclosed. The non-transitory computer-readable medium may storeinstructions that, when executed by a processor, cause a device toperform operations including processing, by a processor, a first imagestream associated with a scene; independently processing, by theprocessor, a second image stream associated with a spatial portion ofthe scene, wherein the second image stream is different from the firstimage stream; outputting the processed first image stream; andoutputting, during the output of the processed first image stream, avisual indication that indicates the spatial portion associated with thesecond image stream.

In another example, a device is disclosed. The device includes means forprocessing a first image stream associated with a scene; means forindependently processing a second image stream associated with a spatialportion of the scene, wherein the second image stream is different fromthe first image stream; means for outputting the processed first imagestream; and means for outputting, during the output of the processedfirst image stream, a visual indication that indicates the spatialportion associated with the second image stream.

BRIEF DESCRIPTION OF THE DRAWINGS

Aspects of this disclosure are illustrated by way of example, and not byway of limitation, in the figures of the accompanying drawings and inwhich like reference numerals refer to similar elements.

FIG. 1A depicts an example device including multiple cameras.

FIG. 1B depicts another example device including multiple cameras.

FIG. 2A is a block diagram of an example device for image processing.

FIG. 2B is another block diagram of an example device for imageprocessing.

FIG. 3 is a block diagram of an example image signal processor.

FIG. 4A illustrates an example scene being captured by a camera.

FIG. 4B illustrates the example scene of FIG. 4A, an intended portion ofthe scene of FIG. 4A to be recorded, and an actual portion of the sceneof FIG. 4A being recorded.

FIG. 5A illustrates an example display previewing the scene of FIG. 4Abeing captured and a visual indication of the portion of the scene ofFIG. 4A being or to be recorded.

FIG. 5B illustrates an example of a first camera capturing the scene ofFIG. 4A and a second camera capturing the portion of the scene of FIG.4A being or to be recorded.

FIG. 6 is an illustrative flow chart depicting an example operation foroutputting a visual indication.

FIG. 7 illustrates an example of a display switching between a previewof the scene of FIG. 4A being captured and the portion of the scene ofFIG. 4A being or to be recorded.

FIG. 8 is an illustrative flow chart depicting an example operation forswitching between a scene being captured and a portion of the scenebeing or to be recorded.

FIG. 9A illustrates an example display concurrently previewing the sceneof FIG. 4A being captured and the portion of the scene of FIG. 4A beingor to be recorded.

FIG. 9B illustrates an example of a display switching between a previewof the portion of the scene of FIG. 4A being or to be recorded and aconcurrent preview of the scene of FIG. 4A being captured and theportion of the scene of FIG. 4A being or to be recorded.

FIG. 9C illustrates an example of a display switching between a zoomassist preview of the scene of FIG. 4A, a preview of the portion of thescene of FIG. 4A being or to be recorded, and a concurrent preview ofthe scene of FIG. 4A.

FIG. 10 is an illustrative flow chart depicting an example operation forswitching between a concurrent preview of a scene and a preview of thescene being or to be recorded.

FIG. 11A illustrates an example display previewing the scene of FIG. 4Abeing captured and resizing a visual indication of the scene of FIG. 4Abeing or to be recorded.

FIG. 11B illustrates an example display previewing the scene of FIG. 4Abeing captured and moving a visual indication of the scene of FIG. 4Abeing or to be recorded.

FIG. 12 is an illustrative flow chart depicting an example operation foradjusting the portion of the scene of FIG. 4A being or to be recordedbased on a user adjusting a visual indication of the portion of thescene of FIG. 4A being or to be recorded.

FIG. 13A illustrates an example scene being captured by a first cameraand an example portion of the scene captured or able to be captured by asecond camera.

FIG. 13B illustrates the example scene in FIG. 13A and the portion ofthe scene of FIG. 13A being or to be recorded.

FIG. 14 is an illustrative flow chart depicting an example operation forswitching between a first image stream and a second image stream.

FIG. 15 is an illustrative flow chart depicting an example operation forswitching from a processed second image stream to a processed firstimage stream.

FIG. 16 is an illustrative flow chart depicting another exampleoperation for switching from a processed second image stream to aprocessed first image stream.

DETAILED DESCRIPTION

Aspects of the present disclosure may assist a user in positioning acamera for recording images or video, and may be applicable to deviceshaving a variety of camera configurations.

Each camera includes a field of view for capturing a scene. Many peopleuse a zoom (“zoom in”) to capture only a portion of the scene in thefield of view. The zoom may be optical, and the camera lenses are movedto change the focal length of the camera (allowing an object in thescene to be magnified without loss of resolution). The zoomalternatively may be digital, and portions of a captured scene arecropped. If portions of the captured scene are cropped, the remainingportion may be stretched on a display (causing some loss in resolution).

In a zoomed in view, camera movements (such as panning or tilting acamera, or a user moving the smartphone or tablet during recording) areamplified (since the object in the view may be magnified or stretched),resulting in the previewed imagery or video (and therefore the recordedimagery or video) not including or being centered on the object or sceneintended to be recorded by the user. For example, if a device isrecording images or video from a soccer game, and the user commands thecamera to zoom in on a specific player or the ball, the player or ballmay not remain centered (or even present) in the camera's field of viewwhile zoomed in. A user may struggle to position the camera, forexample, by attempting to find the player or ball in the zoomed inpreview of the camera display. It is desirable to assist the user inpositioning the camera, for example, to reduce user difficulties inpositioning the camera during a zoomed view.

In some implementations, at least a portion of a device (such as one ormore processors) may process a first image stream (from a first camera)associated with a scene, independently process a second image stream(from a second camera) associated with a spatial portion of the scenedifferent from the first image stream, output the processed first imagestream (such as to preview via a display), and output a visualindication of the spatial portion of the scene associated with thesecond image stream during output of the processed first image stream(such as on the preview of the processed first image stream). In thismanner, aspects of the present disclosure may prevent a user fromstruggling to position a camera at different zoom levels while capturingand/or recording images or video, and also may allow a device to moreeffectively capture and/or record intended portions of a scene. Forexample, as noted above, a user recording a soccer game may use thevisual indication in a preview to identify what portion of the scene isbeing recorded and thus position the camera as desired without searchingin a zoomed in view for the preview.

The terms “capture” and “record” are used to differentiate betweenimages from a camera sensor before being processed or not fullyprocessed (such as for a preview) and images that are fully processed(such as for placing in storage for later viewing or for streaming toothers). When a camera sensor is active, the camera may continually(such as at a predetermined number of frames per second) “capture”images. Many of these images are discarded and not used or fullyprocessed (such as applying denoising, edge enhancement, color balance,and other filters by an image signal processor). “Recorded” images orvideo are captures that the user intends or requests to be fullyprocessed by an image signal processor (such as by pressing a camerabutton for an image, pressing a record button for video, and so on). Acamera preview shows captures without being fully processed. If thecamera preview shows captures that are also being recorded, the previewshows partially processed captures while the image signal processorfully processes the captures. If the camera preview shows capturesbefore an image or video is to be recorded, the preview shows partiallyprocessed captures that are discarded after preview. Once captures arefully processed for recording, the resulting images or video may be,e.g., stored in memory for later viewing, streamed to others for liveviewing, and so on.

In the following description, numerous specific details are set forthsuch as examples of specific components, circuits, and processes toprovide a thorough understanding of the present disclosure. The term“coupled” as used herein means connected directly to or connectedthrough one or more intervening components or circuits. Also, in thefollowing description and for purposes of explanation, specificnomenclature is set forth to provide a thorough understanding of thepresent disclosure. However, it will be apparent to one skilled in theart that these specific details may not be required to practice theteachings disclosed herein. In other instances, well-known circuits anddevices are shown in block diagram form to avoid obscuring teachings ofthe present disclosure. Some portions of the detailed descriptions whichfollow are presented in terms of procedures, logic blocks, processingand other symbolic representations of operations on data bits within acomputer memory. These descriptions and representations are the meansused by those skilled in the data processing arts to most effectivelyconvey the substance of their work to others skilled in the art. In thepresent disclosure, a procedure, logic block, process, or the like, isconceived to be a self-consistent sequence of steps or instructionsleading to a desired result. The steps are those requiring physicalmanipulations of physical quantities. Usually, although not necessarily,these quantities take the form of electrical or magnetic signals capableof being stored, transferred, combined, compared, and otherwisemanipulated in a computer system.

It should be borne in mind, however, that all of these and similar termsare to be associated with the appropriate physical quantities and aremerely convenient labels applied to these quantities. Unlessspecifically stated otherwise as apparent from the followingdiscussions, it is appreciated that throughout the present application,discussions utilizing the terms such as “accessing,” “receiving,”“sending,” “using,” “selecting,” “determining,” “normalizing,”“multiplying,” “averaging,” “monitoring,” “comparing,” “applying,”“updating,” “measuring,” “deriving” or the like, refer to the actionsand processes of a computer system, or similar electronic computingdevice, that manipulates and transforms data represented as physical(electronic) quantities within the computer system's registers andmemories into other data similarly represented as physical quantitieswithin the computer system memories or registers or other suchinformation storage, transmission or display devices.

In the figures, a single block may be described as performing a functionor functions; however, in actual practice, the function or functionsperformed by that block may be performed in a single component or acrossmultiple components, and/or may be performed using hardware, usingsoftware, or using a combination of hardware and software. To clearlyillustrate this interchangeability of hardware and software, variousillustrative components, blocks, modules, circuits, and steps aredescribed below generally in terms of their functionality. Whether suchfunctionality is implemented as hardware or software depends upon theparticular application and design constraints imposed on the overallsystem. Skilled artisans may implement the described functionality invarying ways for each particular application, but such implementationdecisions should not be interpreted as causing a departure from thescope of the present disclosure. Also, the example devices may includecomponents other than those shown, including well-known components suchas a processor, memory and the like.

Aspects of the present disclosure are applicable to any suitableprocessor (such as an image signal processor) or device (such assmartphones, tablets, laptop computers, digital cameras, web cameras,and so on) that include one or more cameras, and may be implemented fora variety of camera configurations. While portions of the belowdescription and examples use two cameras for a device in order todescribe aspects of the disclosure, the disclosure applies to any devicewith at least one camera. For devices with multiple cameras, the camerasmay have similar or different capabilities (such as resolution, color orblack and white, a wide view lens versus a telephoto lens, zoomcapabilities, and so on).

FIG. 1A depicts an example device 100 including a dual camera with afirst camera 102 and a second camera 104 arranged in a firstconfiguration. FIG. 1B depicts another example device 110 including adual camera with a first camera 112 and a second camera 114 arranged ina second configuration. In some aspects, one of the cameras (such as thefirst cameras 102 and 112) may be a primary camera, and the other camera(such as the second cameras 104 and 114) may be an auxiliary camera.Additionally or alternatively, the second cameras 104 and 114 may have adifferent focal length, capture rate, resolution, color palette (such ascolor versus black and white), and/or field of view or capture than thefirst cameras 102 and 112. In some aspects, the first cameras 102 and112 each may include a wide field of view and the second cameras 104 and114 each may include a narrower field of view (such as a telephotocamera). In other aspects, the first cameras 102 and 112 may have thesame capabilities as the second cameras 104 and 114 yet not have thesame vantage of a scene to be captured or recorded.

While an example device that may be a smartphone or tablet including adual camera is depicted, aspects of the present embodiments may beimplemented in any device with an image signal processor. Anotherexample device is a wearable (such as smartwatches) which may connect toa smartphone or tablet. A further example device is an augmented orvirtual reality headset coupled (e.g., in communication with orphysically connected to) to cameras. Another example device is a droneor automobile coupled to or including cameras. A further example deviceis a video security system coupled to security cameras. The examples arefor illustrative purposes only, and the disclosure should not be limitedto any specific example or device.

The term “device” is not limited to one or a specific number of physicalobjects (such as one smartphone). As used herein, a device may be anyelectronic with multiple parts that may implement at least some portionsof this disclosure. While the below description and examples use theterm “device” to describe various aspects of this disclosure, the term“device” is not limited to a specific configuration, type, or number ofobjects.

FIG. 2A is a block diagram of an example device 200 including multiplecameras. The example device 200, which may be one implementation of thedevices 100 and 110 of FIGS. 1A and 1B, may be any suitable devicecapable of capturing images or video including, for example, wired andwireless communication devices (such as camera phones, smartphones,tablets, security systems, dash cameras, laptop computers, desktopcomputers, wearable cameras, drones, and so on), digital cameras(including still cameras, video cameras, and so on), or any othersuitable device. The example device 200 is shown in FIG. 2A to include afirst camera 202, a second camera 204, a processor 206, a memory 208storing instructions 210, a camera controller 212, a display 216, and anumber of input/output (I/O) components 218. The device 200 may includeadditional features or components not shown. For example, a wirelessinterface, which may include a number of transceivers and a basebandprocessor, may be included for a wireless communication device. Device200 may include additional cameras other than the first camera 202 andthe second camera 204. The disclosure should not be limited to anyspecific examples or illustrations, including example device 200.

The first camera 202 and the second camera 204 may be capable ofcapturing individual image frames (such as still images) and/orcapturing video (such as a succession of captured image frames). Asuccession of still images or video from a camera may be called an imagestream. The first camera 202 and the second camera 204 may include oneor more image sensors (not shown for simplicity) and shutters forcapturing an image stream and providing the captured image stream to thecamera controller 212.

The memory 208 may be a non-transient or non-transitory computerreadable medium storing computer-executable instructions 210 to performall or a portion of one or more operations described in this disclosure.The device 200 may also include a power supply 220, which may be coupledto or integrated into the device 200.

The processor 206 may be one or more suitable processors capable ofexecuting scripts or instructions of one or more software programs (suchas instructions 210) stored within the memory 208. In some aspects, theprocessor 206 may be one or more general purpose processors that executeinstructions 210 to cause the device 200 to perform any number ofdifferent functions or operations. In additional or alternative aspects,the processor 206 may include integrated circuits or other hardware toperform functions or operations without the use of software. While shownto be coupled to each other via the processor 206 in the example of FIG.2 , the processor 206, memory 208, camera controller 212, the display216, and I/O components 218 may be coupled to one another in variousarrangements. For example, the processor 206, the memory 208, the cameracontroller 212, the display 216, and/or the I/O components 218 may becoupled to each other via one or more local buses (not shown forsimplicity).

The display 216 may be any suitable display or screen allowing for userinteraction and/or to present items (such as captured images and video)for viewing by a user. In some aspects, the display 216 may be atouch-sensitive display. The I/O components 218 may be or include anysuitable mechanism, interface, or device to receive input (such ascommands) from the user and to provide output to the user. For example,the I/O components 218 may include (but are not limited to) a graphicaluser interface, keyboard, mouse, microphone and speakers, and so on.

The camera controller 212 may include an image signal processor 214,which may be one or more image signal processors, to process capturedimage frames or video provided by the first camera 202 and/or the secondcamera 204. In some example implementations, the camera controller 212(such as by using the image signal processor 214) may control operationof the first camera 202 and the second camera 204. In some aspects, theimage signal processor 214 may execute instructions from a memory (suchas instructions 210 from the memory 208 or instructions stored in aseparate memory coupled to the image signal processor 214) to controloperation of the cameras 202 and 204 and/or to process and provide oneor more image streams for recording or previewing. In other aspects, theimage signal processor 214 may include specific hardware to controloperation of the cameras 202 and 204 and/or to process and provide oneor more image streams for recording or previewing. The image signalprocessor 214 may alternatively or additionally include a combination ofspecific hardware and the ability to execute software instructions.

While FIG. 2A illustrates an example implementation of a device 200,device 200 is not required to include all of the components shown inFIG. 2A. FIG. 2B illustrates another example implementation of device200, showing that device 200 need not include all of the componentsillustrated in FIG. 2A. For example, device 200 may include the imagesignal processor 214 (which may be part of a camera controller) andmemory 208 including instructions 210, and may be coupled to or includea power supply 220. First camera 202 and second camera 204 may beseparate from and coupled to device 200 (such as for a security system,desktop computer, or other devices where the cameras are remote to thedevice). In some example implementations, device 200 receives capturestreams from the cameras for processing and provides commands to thecameras for positioning the camera.

Alternatively or additionally, display 216 may be separate from andcoupled to device 200. In one example, display 216 may be a wirelessdisplay coupled to the device performing the image processing. Forexample, a drone may provide captures to a user's tablet or smartphonefor preview, and the drone may include an image signal processor tofully process any captures intended for recording. I/O components 218may also be separate from device 200. For example, if the input is agraphic user interface, some or all of the I/O components may be part ofdisplay 216.

As shown, various device configurations and types may be used inimplementing aspects of the present disclosure. As a result, thedisclosure should not be limited to a specific device configuration ortype.

FIG. 3 is a block diagram of an example image signal processor 300. Theimage signal processor 300 may be one implementation of the image signalprocessor 214 of the camera controller 212 illustrated in FIG. 2 . Theimage signal processor 300 may be a single thread (or single core)processor with a sequence of filters 302A-302N to process a first imagestream. In one example implementation, filter 1 (302A) may be a noisereduction filter, filter 2 (302B) may be an edge enhancement filter, andfilter N (302N) may be a final filter to complete processing the imagestream. Alternatively, the image signal processor 300 may be a multiplethread (or multiple core) processor with one or more additionalsequences of filters 304A-304N to process other image streams.

When a user utilizes a conventional device to record or capture a scene(such as a father using a smartphone to record his child's soccer gameor plano recital), the scene is typically previewed on a display of thedevice. When the user zooms into a portion of the scene (such as thefather zooming in on his child), the device typically previews thezoomed in portion of the scene. If the zoom is a digital zoom, thedevice may preview only a portion of the scene being captured by thedevice's camera(s). In this manner, a conventional camera controller mayoutput for preview only a portion of the image stream being captured. Ifa user loses track of an object to be recorded in a zoomed in view andthe preview does not show the object, the user may have difficultiespositioning (such as moving (e.g., left, right, up, down, anddiagonally) or orienting (e.g., panning, tilting, and rotating) thecamera to find the object in the preview.) For example, if theaforementioned father does not see his child in a zoomed in preview, thefather may have difficulties determining the direction and distance inwhich to change the position of the camera to locate his child.

FIG. 4A illustrates an example scene 402 being captured by a camera. Forpurposes of discussion herein, the example scene 402 is captured orrecorded by the first camera 202 or the second camera 204 (or both thefirst camera 202 and the second camera 204) of the device 200 of FIG. 2. The example scene 402 is of a player scoring a goal during practice. Auser may wish to zoom in on the ball while recording the scene 402, anda preview of the zoomed-in scene being recorded may differ from what theuser intends to record. FIG. 4B depicts the example scene 402 of FIG.4A, depicts an actual portion 404 of the zoomed-in scene being or to berecorded, and depicts an intended portion 406 of the scene to berecorded. If the device previews the portion 404 of the scene being orto be recorded, the user may have difficulties determining that thelocation of the intended portion 406 of the scene to be recorded is, inthis example, to the right and below the location of the portion 404 ofthe scene being or to be recorded. As a result, the user may not know inwhich direction to move or orient the camera. For example, the user mayspend time moving the device to try to find the ball in the zoomed inview, or may expend device resources zooming out and again zooming in torelocate the ball in the preview. As a result, a user may be too late inrecording a wanted image or video or otherwise lose opportunities inrecording an intended object at an intended time (such as recording hischild when scoring a goal).

In accordance with various aspects of the present disclosure, a display(such as example display 216, which may be coupled to or included in adevice) may be configured to assist a user in positioning one or morecameras. In some implementations, the display may preview a scene beingcaptured by a camera (which includes the portion of the scene being orto be recorded). In the preview of the scene, a display (incommunication with an image processing device) may display a visualindication of the portion of the scene being or to be recorded. In thismanner, the user is able to readily determine the location of theportion of the scene being or to be recorded with respect to the scenebeing captured.

FIG. 5A illustrates an example display 502 previewing the scene 402 ofFIG. 4A being captured and a visual indication 504 of the portion of thescene being or to be recorded. For simplicity and brevity, discussionsrelated to a portion of a scene being or to be recorded, as indicated bythe visual indication of this disclosure, may be referred to as aportion of the scene being recorded. The display 502 may be display 216of the device 200 of FIGS. 2A and 2B, with the device 200 recording theportion of the scene indicated by visual indication 504, but anysuitable device configuration may be used. While the visual indication504 is illustrated as a dashed rectangle that indicates the portion ofthe scene being recorded, the visual indication 504 may take any form toindicate the portion of the scene being recorded. In some otherexamples, the visual indication 504 may indicate the portion of thescene as a grayed colored area or other contrasted area of the preview,may indicate the corners of the portion of the scene being recorded,include a marker identifying the center of the portion of the scenebeing recorded, a solid line box indicating the portion of the scenebeing recorded, and so on. In addition, recording a portion of the sceneincludes recording video as well as one or more still images. In thismanner, a user may prepare the visual indication 504 to be centered on aportion of the scene for an upcoming image or video to be recorded.

One camera's capture stream may include an entire scene, and a spatialportion (e.g., the spatial portion of the scene defined/bounded by thevisual indication 504) of that stream is output (such as by the cameracontroller 212 of FIG. 2 ) for recording. Alternatively, a firstcamera's stream may include the entire scene while a second camera'sstream includes the portion of the scene being or to be recorded. FIG.5B illustrates an example of the first camera 202 of the device 200capturing the scene 506 and the second camera 204 of the device 200capturing the portion 508 being or to be recorded of the scene 506. Inthis manner, a display 216 may preview the scene 506 being captured bythe first camera 202 and present (e.g., display) a visual indicationwhich includes the portion 508 (of the scene 506) being captured by thesecond camera 204 for recording.

In additional or alternative implementations, a device may be configuredto record either or both of the capture streams. In one example, thedevice may request a user to select one of the streams to be recorded orautomatically select the stream to be recorded. In another example, onecapture stream may be used exclusively for previews. The device mayrequest the user to select which capture stream to use for preview, orthe device may automatically select the capture stream to be used forpreview. In a further example, the device automatically records bothcapture streams. If recording both capture streams, a user may berequested to select one or both of the recordings for storage(discarding the unselected recordings).

In some example implementations, the first camera 202 and the secondcamera 204 are part of the dual camera of the device 200. In some dualcameras, the two cameras 202 and 204 have similar capabilities, such asresolution, color palette, zoom, focal length, shutter speed, and so on.Alternatively, the two cameras 202 and 204 may have differentcapabilities. In some examples, the first camera 202 may be a colorcamera and the second camera 204 may be a black and white camera thatmay have better fidelity in low light settings. In some other examples,the first camera 202 may be a high resolution camera (such as 8megapixels, 13 megapixels, and so on) and the second camera 204 may be alower resolution camera than the first camera 202, for example, toassist the first camera with auto-focus. In some further examples, thefirst camera 202 may be a wide angle view camera and the second camera204 may be a narrower field of view camera with a longer focal lengththan the first camera 202, for example, to capture objects further awayfrom the device. Some devices may include different configurations of adual camera, and other devices may include more than two cameras.Implementations of the present disclosure apply to any cameraconfiguration and type of device. The provided examples using a twocamera configuration are provided only for illustrative purposes, andthe disclosure should not be limited to or by any of the providedexamples.

FIG. 6 is an illustrative flow chart depicting an example operation 600for outputting a visual indication. The outputted visual indication maybe presented on a display to assist a user in positioning a camera sothat the device may receive capture streams including the intended scenebeing recorded. For example, a user may use the visual indication theidentify how to position a camera in order to have its field of viewinclude an intended scene. The example operation 600 is described belowwith respect to two image streams (such as a first image stream from thefirst camera 202 and a second image stream from the second camera 204 ofthe device 200). However, aspects apply to any number of image streams(including one image stream or three or more image streams).

While the example operations (including example operation 600) aredescribed regarding a device 200, camera controller 212, or image signalprocessor 214, any capable component or module may perform theoperation. For example, even though a device 200 or a camera controller212 may be described as performing an operation, an image signalprocessor 214 (such as in FIG. 2A or 2B), processor 206 (FIG. 2A),camera controller 212 (FIG. 2A) or other module or component may performthe operation. Further, the term “output” may include providing to aseparate device, providing to a remote display, displaying on anincluded display of a device, providing from one component of a deviceto another component of the device, or providing from one component of adevice to a module external to the device. The disclosure should not belimited to specific components or modules performing operations asdescribed in the example operations.

Beginning at 602, the device 200 may process a first image streamassociated with an entirety of a scene. In one example, the first camera202 may capture the scene 506 (FIG. 5B) and provide the first imagestream to the camera controller 212 of device 200, which processes theincoming first image stream. In another example, the camera controller212 of device 200 processes an image stream received from another deviceor stored in a memory (such as memory 208). In some exampleimplementations, the image signal processor 214 may process the firstimage stream. For example, the image signal processor 300 (FIG. 3 ) mayapply filters 302A-302N to the first image stream. Additionally oralternatively, the image signal processor 300 may perform otherfunctions to the first image stream, such as cropping, zooming,de-interlacing, and so on.

The camera controller 212 of device 200 may also independently process asecond image stream associated with a spatial portion (e.g., a portionless than or equal to an entirety) of the scene in the first imagestream (604). In one example, the second camera 204 may capture thespatial portion 508 of the scene 506 (FIG. 5B) and provide the resultingsecond image stream to the camera controller 212, which processes theincoming second image stream. In other examples, the second image streammay be provided by another device or from memory (such as the memory208). Referring to the previous example of the image signal processor300 applying filters 302A-302N to the first image stream, the imagesignal processor 300 may apply filters 304A-304N to the second imagestream, and may also or alternatively perform other functions, such ascropping, zooming, de-interlacing, and so on.

In some example implementations for processing the second image stream,the device 200 (such as camera controller 212 or image signal processor214) may determine the size and location of a visual indication in thescene 506 of the first image stream (606). For example, the device 200may embed the visual indication into the processed first image stream,create a layer on the processed first image stream, augment theprocessed first image stream and so on, so that the captured scene 506and the visual indication may be displayed concurrently (such as on adisplay 216).

It should be noted that this disclosure should not be limited to thesecond camera 204 having a smaller field of view than the first camera202. For example, the cameras may be at different zoom levels so that acamera with a larger field of view than the other camera captures asmaller portion of the scene than the other camera. Additionally, aspreviously noted, the image signal processor 214 may be any number ofprocessors, threads, and/or cores. In some example implementations, theimage signal processor 214 and the processor 206 may be part of a Systemon Chip (SoC). As such, it should be noted that various aspects of thepresent disclosure are not limited to any specific hardware.

Proceeding to 608, the device 200 may output the processed first imagestream for preview. In some example implementations, the cameracontroller 212 may generate the processed first image stream. Upongenerating the processed first image stream, the device 200 may previewthe scene 506 on display 216 (610). For example, device 200 may outputthe processed first image stream to display 216, and display 216previews the scene 506 by displaying the processed first image stream.During or after generating and outputting the processed first imagestream (such as by camera controller 212), the visual indication of thespatial portion of the scene associated with the second image stream mayalso be output (612). The display 216 may optionally display the visualindication on the scene 506 being previewed (614). For example, theprocessed first image stream may include the visual indication orotherwise be linked to the visual indication so that camera controller212 can associate the visual indication with the portion of the scene tobe recorded in the processed first image stream.

While example operation 600 shows processing the image streams insequence and generating the processed first image stream and the visualindication in sequence, processing different image streams may beperformed concurrently and outputting or generating a processed imagestream and visual indication may also be performed concurrently. Theprocessed second image stream may be output while outputting theprocessed first image stream. For example, the camera controller 212 maygenerate at least a portion of the processed second image streamassociated with the portion of the scene being recorded. The processedimage stream may be stored in a memory of the device (such as memory208) or output to another device or memory. If the display 216 previewsthe processed first image stream and the visual indication, the visualindication indicates the portion of the scene captured in the processedfirst image stream being recorded in at least a portion of the secondimage stream.

While the example operation 600 (and the other example operations inthis disclosure) describes using the processed second image stream forrecording, only a portion of the processed second image stream might beused for recording. For example, a digital zoom may be used for thesecond camera 204 so that the entire scene captured by the second camera204 is not to be recorded. It should be noted that an image stream mayrefer to one or more temporal or spatial portions of the image stream orthe stream in its entirety, and the disclosure should not be limited toa specific implementation of an image stream.

With a visual indication shown on a preview of the scene, the user maybetter understand how to move the device or the cameras in order tolocate an object of interest in the stream (or portion of the stream)being or to be recorded. The preview of the scene with the visualindication may be called a “zoom assist” preview. In some exampleimplementations, the user may wish to switch between two or more of: (1)the zoom assist preview in which the preview may depict both anindication of the portion of a scene being recorded as well as a previewof the entire scene being captured; (2) a conventional preview in whichthe preview may depict only what is being recorded; (3) a concurrentview in which a combination of the zoom assist preview and theconventional preview are depicted (such as a side-by-side (SBS) view,picture in picture (PiP) view, windowed view, etc., of the zoom assistpreview and the convention preview); (4) an alternative preview in whichthe preview may depict a different portion of the scene than theconventional preview; (5) a different zoom level preview in which thepreview may depict a portion of the scene at a different zoom level(such as a different digital zoom level) than the conventional preview;or (6) a concurrent view in which a combination of two or more of theabove previews a depicted.

FIG. 7 illustrates an example switching operation 706 of the display 216between a zoom assist preview 702 and a preview 704 of the portion ofthe scene being or to be recorded. In some example implementations, thedevice 200 may allow a button, a menu, a gesture, or other user-basedcommand to determine when to switch between the previews 702 and 704. Insome implementations, the command toggles between activation anddeactivation of the zoom assist preview functionality. In some otherimplementations, the command changes the preview while one or more otherpreviews are still generated but not displayed or output for display.

In one example, the display 216 may present a zoom assist button 708 toallow the user to switch between previews 702 and 704, with the preview702 including a visual indication 710 indicating the portion of thescene being or to be recorded. In other examples, the user may use aswipe gesture, shake the device 200, or provide audible, visual or othertouch commands to switch between the previews 702 and 704.

Additionally or alternatively, the decision to switch between thepreviews 702 and 704 may be determined automatically (e.g.,“on-the-fly”) by the device 200 based on one or more criteria. Forexample, one or more criteria for causing the device 200 to switch frompreview 704 to preview 702 may include camera movement, an object movinginto the portion of the scene being captured, motion of an object ofinterest (e.g., an object of interest may be automatically tracked bythe device 200 for recording), and so on, that may cause the device 200to present the zoom assist preview 702 to assist a user in positioningthe first camera 202 and/or the second camera 204. Likewise, one or morecriteria for causing the device 200 to switch from the preview 702 tothe preview 704 may include an assessment (or analysis) of a determinedamount of motion, determined depth, and/or determined size of, forexample, an object of interest that is being tracked (e.g., trackedbased on user selection or predetermined criteria) relative to variousassociated threshold levels.

FIG. 8 is an illustrative flow chart depicting an example operation 800for switching between a scene being captured (such as the scene in afirst image stream being captured by the first camera 202) and a portionof the scene being or to be recorded (such as at least a portion of thesecond image stream captured by the second camera 204). For example, thecamera controller 212 (operating alone or in collaboration with othercomponents such as the processor 206) may determine whether to switchbetween outputting (such as for preview) the processed first imagestream (and the visual indication) and the processed second imagestream. The output image stream may be the image stream previewed by thedisplay 216.

In some example implementations, the camera controller 212 may generatefor recording more than one image stream (such as both the first imagestream and the second image stream). In one example, the cameracontroller 212 may generate and output for recording the processed imagestream not currently being previewed. A user may be presented an optionof selecting which recorded image stream to keep, such as by being ableto review each image stream and select the image stream being reviewedto be kept or deleted. While the example operation 800 shows switchingbetween an image stream being captured and an image stream beingrecorded, both image streams may be recorded, and the disclosure shouldnot be limited to recording one image stream or recording as shown inthe specific examples provided.

Beginning at 802, a processed first image stream may be generated forpreview. For example, the camera controller 212 (such as by using theimage signal processor 214) may generate the processed first imagestream. The display 216 may optionally display the zoom assist preview,for example, by presenting the processed first image stream and thevisual indication (804). Referring back to FIG. 7 , the display 216 maydisplay the zoom assist preview 702 with the visual indication 710. Thedevice 200 may then determine from one or more criteria (such as a usertapping a zoom assist button, swiping the screen, movement in the scene,camera movement, and so on) if the device 200 is to switch fromoutputting the processed first image stream to outputting the processedsecond image stream (806). For example, the device 200 determines if thedisplay 216 should switch from the zoom assist preview 702 to thepreview 704 of the scene portion being recorded, as depicted in theexample of FIG. 7 . If the device 200 is not to switch, then the device200 continues to output the processed first image stream (802). Forexample, the display 216 continues to present the zoom assist preview702 with the visual indication 710 (804).

If the device 200 is to switch from outputting the processed first imagestream, the device 200 switches to outputting the processed second imagestream for preview (808). In one example, the camera controller 212 mayswitch to generating the processed second image stream. In anotherexample, the camera controller 212 generates both processed imagestreams, and the device 200 determines to switch outputting to display216 from the zoom assist preview 702 to a preview 704 of the processedsecond image stream. In this manner, the display 216 may optionallypresent the processed second image stream (810), for example, bypreviewing to the user what is being or to be recorded.

The device 200 (such as camera controller 212) may then determine fromone or more criteria (such as a change in the one or more criteria or anadditional user request or input) if the device 200 is to switch fromoutputting the processed second image stream to the processed firstimage stream (812). For example, the device 200 determines if thedisplay 216 should switch from presenting the scene portion 704 beingrecorded to the zoom assist preview 702 in FIG. 7 . If no switch is tooccur, then the device 200 continues to output the processed secondimage stream (808). For example, the display 216 continues to presentthe scene portion 704 being recorded (808). If a switch is to occur(812), the device 200 switches to outputting the processed first imagestream, for example, so that the zoom assist preview may be presented onthe display 216. In one example, if both processed image streams aregenerated by camera controller 212 or image signal processor 214, thedevice 200 may switch between outputting the generated image streams. Inanother example, the camera controller 212 may output one processedimage stream and switch processed image streams to be output.

In some example implementations, the display 216 may concurrentlydisplay the zoom assist preview and the portion of the scene being or tobe recorded. FIG. 9A illustrates an example display presenting aconcurrent preview 902, including the zoom assist preview 904 (with avisual indication 908) and the portion of the scene 906 being recorded.The display 902, which may be one implementation of the display 216,additionally may include a button 910 to switch between previews (suchas between the concurrent display of previews 904 and 906 and a preview906 of what is being or to be recorded). While the concurrent preview902, including previews 904 and 906, is shown as side by side, thepreviews 904 and 906 may be presented concurrently in any manner, suchas picture in picture, separate windows, and so on. Additionally, whilethe preview 906 is shown in letterbox fashion, only a portion of zoomassist preview 904 is shown, and each of the previews are displayed onhalf of the display, all or any portion of each preview 904 and 906 maybe shown on any amount of the display. For example, the display 216 maydisplay both previews 904 and 906 in a letterbox fashion, may displayonly a portion of each of the previews 904 and 906, allow the user todetermine how the previews 904 and 906 are to be concurrently displayed,or allow the user to change how much of the display 902 is to be usedfor each of the previews 904 and 906. It should therefore be noted thatthe disclosure should not be limited to any of the example displays orpreviews provided.

A user may wish to switch (or the device 200 may automatically switch byswitching outputs of processed image streams) between a concurrentdisplay of previews (“concurrent preview”) and the zoom assist preview.FIG. 9B illustrates an example operation 912 of a display switchingbetween the concurrent preview 902 and the zoom assist preview 904. Inone example, a user may press the zoom assist (ZA) button to switchbetween the previews 902 and 904. The device 200 may additionally oralternatively switch outputs to a display 216 so that the displayswitches between presenting previews 902 and 904 based on one or moreother criteria (such as camera movement, object movement, and so on).

Additionally or alternatively, the display may switch between theconcurrent preview 902, the zoom assist preview 904, and a preview 906of what is being or to be recorded. For example, the device 200 mayswitch between outputting the processed image streams for each of thepreviews. FIG. 9C illustrates an example of a display switching betweenthe zoom assist preview 904, the preview of the portion of the scenebeing or to be recorded 906, and/or the concurrent preview 902, asindicated by switching operations 914A-914C. In one example, a user maypress the ZA button to cycle through the previews. In another example,the display may include multiple buttons (such as soft buttons and/orphysical buttons) so that a user may directly switch to an intendedpreview. In a further example, the user may swipe left for one previewand swipe right for the other preview (or swipe in any other direction,such as up, down, or diagonally). Other criteria may additionally oralternatively be used for the device to determine to switch previews(such as camera movement, object movement, and so on).

FIG. 10 is an illustrative flow chart depicting an example operation1000 for switching between a concurrent preview and a preview of thescene being recorded. For example, the camera controller 212 (or device200) may switch from concurrently outputting the processed first imagestream (and the visual indication) and the processed second image stream(such as for displaying the concurrent preview on display 216) forpreview to outputting only the processed second image stream (such asfor displaying on display 216 what is being recorded) for preview. Insome alternative implementations, the camera controller 212 (or device200) may concurrently output the processed first image stream and theprocessed second image stream for preview while switching between theconcurrent preview and a preview of what is being or to be recorded. Theexample operation 1000 of FIG. 10 is discussed with respect to FIG. 9B,but similar processes or steps in the example operation 1000 of FIG. 10may be used to switch between previews illustrated in FIG. 9C or otherexample implementations.

Beginning at 1002, the device 200 may concurrently output the processedfirst image stream and the processed second image stream for aconcurrent preview on display 216. For example, the camera controller212 (such as by using the image signal processor 214) may concurrentlyoutput the processed first image stream and the processed second imagestream. The display 216 may display the concurrent preview 902,including the zoom assist preview and a preview of what is being or tobe recorded (1004). The device 200 may then determine from one or morecriteria (such as receiving a user command from display 216 by the usertapping a zoom assist button or swiping the screen, determining movementin the scene or camera movement, and so on) if the device 200 (or cameracontroller 212) is to switch from concurrently outputting the processedfirst and second image streams to outputting only the processed secondimage stream for preview (1006). For example, the device 200 determinesif the display 216 should switch (913) from the concurrent preview 902to the preview 904 of what is being recorded. If no switch is to occur,the device 200 continues to concurrently output the processed first andsecond image streams (1002). For example, display 216 continues topresent the concurrent preview 902 (1004).

If a switch is to occur (1006), the device 200 switches to outputtingthe processed second image stream (1008). In one example, the cameracontroller 212 (such as by using the image signal processor 214) mayswitch to outputting the processed second image stream. In anotherexample, the camera controller 212 outputs both processed image streamsfor preview, and the device 200 determines to switch from outputting theprocessed first image stream for display 216 to present the concurrentpreview to outputting the processed second image stream for display 216to present. In this manner, the display 216 may optionally display theprocessed second image stream (1010), previewing what is being or to berecorded.

The device 200 may then determine from the one or more criteria (such asa change in the one or more criteria or an additional user request orinput) if to switch from outputting the processed second image streamfor preview to concurrently outputting the processed first and secondimage streams for preview (1012). For example, the device 200 determinesif the display 216 should switch from presenting previews (913) from apreview 904 indicating the scene portion being recorded to a concurrentpreview 902 in FIG. 9A. If no switch is to occur, the device 200continues to output the processed second image stream (1008). Forexample, the display 216 continues to present the preview 904 indicatingthe scene portion being or to be recorded (1010). If a switch is tooccur (1012), the device 200 switches to concurrently outputting theprocessed first and second image streams (1002). In this manner, theconcurrent preview 902 may be presented by display 216. In somealternative implementations, the device 200 (such as by using the cameracontroller 212) may concurrently output both the processed first andsecond image streams, and the display 216 switches from presenting thepreview of what is being recorded to presenting the concurrent preview.

In some example implementations, the display 216 may allow the user tointeract with the presented preview (such as the user resizing and/ormoving the visual indication shown on display 216). In some examples, ifthe display 216 is a touch-sensitive display, the device 200 may receivefrom the display 216 an indication that a user provided a pinch gestureto reduce the size of the visual indication and/or a spread gesture toincrease the size of the visual indication. Additionally oralternatively, the user may provide a drag gesture to move the locationof the visual indication. In some other examples, the user may providecommands via physical buttons (such as directional buttons, a zoom orscroll wheel, and so on) of a display 216 or device 200 or a microphonereceiving audible commands. In some other examples, the device 200 mayinclude or be coupled to a gyroscope and/or accelerometer receivingforce commands.

FIG. 11A illustrates an example display 1102 providing a zoom assistpreview wherein a first visual indication 1104 is resized to a secondvisual indication 1106 to indicate more of a portion of the scene beingor to be recorded. Example display 1102 may be one implementation of thedisplay 216 of or coupled to the device 200. Scene portion 1108corresponds to the first visual indication 1104, and scene portion 1110corresponds to the second visual indication 1106. In some examples, auser provides a spreading gesture for the first visual indication 1104via the display 216 to switch from the first visual indication 1104 tothe second visual indication 1106 and thus switches from the sceneportion 1108 to the scene portion 1110 being or to be recorded.

FIG. 11B illustrates an example display 1112 providing a zoom assistpreview wherein a first visual indication 1114 is moved to a secondvisual indication 1116 to indicate a different portion of the scenebeing or to be recorded. Example display 1112 may be one implementationof the display 216 of or coupled to the device 200. Scene portion 1118corresponds to the first visual indication 1114, and scene portion 1120corresponds to the second visual indication 1116. In some examples, auser provides a drag gesture for the first visual indication 1114 viathe display 216 to switch from the first visual indication 1114 to thesecond visual indication 1116 (such as moving the visual indication) andthus switch from the scene portion to the scene portion 1110 being or tobe recorded.

FIG. 12 is an illustrative flow chart depicting an example operation1200 for adjusting a portion of the scene being or to be recorded basedon a user input to adjust a visual indication. The example operation1200 of FIG. 12 is discussed with respect to FIGS. 11A and 11B, butsimilar processes or steps in the example operation 1200 of FIG. 12 maybe used to resize what is to be or being recorded for other exampleimplementations. For example, while a zoom assist preview is described,adjusting the visual indication may occur in a concurrent preview orother previews.

Beginning at 1202, the display 216 may display the zoom assist preview(or alternatively, a concurrent preview) including a visual indicationof the portion of the scene being or to be recorded. While the display216 presents the zoom assist preview, the device 200 may receive a userinput or request to adjust the visual indication (1204), such as fromdisplay 216 providing user commands from a user interaction with thedisplay. For example, the device 200 may optionally receive a usercommand to adjust the size of the visual indication 1104 in FIG. 11A(1206). Additionally or alternatively, the device 200 may optionallyreceive a user command to move the location of the visual indication(1208). By requesting the visual indication be adjusted (such as throughinteracting with the display 216), a user indicates that the device 200is to record a different portion of the scene than currently indicatedby the visual indication in the zoom assist preview.

In response to the user command, the device 200 may adjust processingthe second image stream (1210). In adjusting processing of the secondimage stream (1210), the device 200 may optionally adjust the size ofthe portion of the scene being recorded or to be recorded in the secondimage stream (1212). For example, when the scene portion 1108 (FIG. 11A)is output for recording, the device 200 adjusts processing the secondimage stream so that the scene portion 1110 is output for recording ifthe user changes the first visual indication 1104 to the second visualindication 1106. Additionally or alternatively, the device 200 mayoptionally change the spatial location of the portion of the scene beingor to be recorded (1214). For example, where scene portion 1118 (FIG.11B) is output for recording, device 200 adjusts processing the secondimage stream so that scene portion 1120 is output for recording if theuser moves the visual indication 1114 to the location of visualindication 1116 in preview 1112.

In some example implementations, the device 200 may adjust what portionof the scene the second camera 204 captures for recording, or send acommand to the second camera 204 to adjust what is being captured,before applying one or more filters to the captured second image stream.In one example, the camera controller 212 may send a command to secondcamera 204 to change an optical zoom level of second camera 204. Inanother example, the camera controller 212 may send a command to secondcamera 204 to adjust the pan and/or tilt of second camera 204 (such asfor a security camera).

In some other example implementations, the device 200 may crop thecaptured second image stream from the second camera 204 (or theprocessed second image stream after applying one or more filters). Inthis manner, the device 200 may adjust cropping the second image streamso that only the portion of the scene associated with the adjustedvisual indication is output for recording. For example, the secondcamera 204 captures more of the scene than what is recorded (such as adigital zoom may be used for the second image stream to show what is tobe or being recorded). If the device 200 is to record a differentportion of the scene currently being recorded in the second imagestream, the second camera 204 might capture the same scene, and thedevice 200 (such as camera controller 212) may adjust the portion of thesecond image stream being recorded without adjusting the second camera204.

Referring back to FIG. 12 , the device 200 may adjust generating thedisplayed visual indication in response to adjusting processing thesecond image stream and/or in response to the user input to adjust thevisual indication (1216). In some example implementations, the device200 may optionally adjust the size of the visual indication to bedisplayed in the preview (1218). Additionally or alternatively, thedevice 200 may optionally move the visual indication to the new locationto be displayed in the preview (1220).

In addition or alternative to a user requesting a change to the sizeand/or location of the visual indication (such as by user gestures on atouch-sensitive display 216 or other user inputs), the device 200 mayautomatically adjust generating the size and/or location of the visualindication (and thus the portion of the scene being or to be recorded)in response to one or more criteria. In one example, if the device 200tracks an object for recording (such as a face, person, soccer ball, andso on), and the camera is unable to focus on the object (such as thatthe object is blurry in the recording), the device 200 may record moreof the scene including the object (increasing the size of the visualindication and thus “zooming out” from the object) in order to adjustthe focus to make the object clear in the recording. For example, thedevice 200 may send a command to the camera to optically zoom out sothat more of the scene is captured. In another example, if thebrightness of the scene is reduced, the device 200 may command a camerato capture more of the scene for recording (which increases the size ofthe visual indication) to attempt to capture more ambient light. In afurther example, if the device 200 is tracking a moving object, thedevice adjusts the portion of the scene being or to be recorded (thusadjusting the location of the visual indication in the preview) toattempt to track the object.

In some example implementations, the second camera 204 does not captureas much of the scene as the first camera 202, or the second camera 204captures a different portion of the scene than the first camera 202. Forexample, some dual cameras have a first camera with a wide field of viewand a second camera with a narrower field of view (such as a telephotocamera). In this manner, a second camera may be unable to capture all ofthe scene in the first image stream. If a user of the device 200attempts to adjust the visual indication (such as move or resize thevisual indication via display 216) in a zoom assist preview to an areaof the scene that is not captured by the second camera 204, the device200 may automatically switch to using the first image stream (providedfrom first camera 202) in recording the new portion of the scene. Theswitch from using the second image stream to the first image stream forrecording may be seamless and invisible to the user. For example, thecamera controller 212 may seamlessly switch from outputting at least aportion of the processed second image stream for recording to outputtingat least a portion of the processed first image stream for recording.Alternatively, the device 200 may notify the user (such as audible orvisual notifications) that the stream used for recording has changed. Insome other example implementations, both image streams may be recorded,and the device 200 may stitch portions of the two image streams togetherto generate a processed image stream corresponding to the portion of thescene indicated by the visual indication.

FIG. 13A illustrates an example scene 1302 being captured by the firstcamera 202 and an example portion 1304 of the scene captured or able tobe captured by the second camera 204. As shown, the scene portion 1304captured by the second camera 204 is less than the scene 1302 capturedby the first camera 202. In the illustrated example, the scene portion1306 may be originally recorded or to be recorded. If the scene portionto be recorded is adjusted to be the scene portion 1308, the secondcamera 204 may be unable to capture the scene portion for recording. Forexample, a user may gesture on display 216 to adjust the visualindication in a zoom assist preview to change from recording the sceneportion 1306 to recording the scene portion 1308, which is not capturedin its entirety by the second camera 204. The device 200 may switch fromusing the second image stream for recording to using the first imagestream for recording so that all of the intended portion of the scene isrecorded.

FIG. 13B illustrates the example scene 1302 in FIG. 13A captured by thefirst camera 202 and the scene portion 1308 being or to be recorded,wherein the first image stream (provided from the first camera 202)includes the scene portion 1308 (corresponding to the image 1310) thatis recorded or to be recorded. In this manner, the second image stream(provided from the second camera 204) might not be used for recordingthe scene portion 1308.

FIG. 14 is an illustrative flow chart depicting an example operation1400 for switching between a processed first image stream and aprocessed second image stream for recording a portion of the scene.Beginning at 1402, the display 216 may present a preview including avisual indication (such as a zoom assist preview or a concurrentpreview). With the visual indication indicating the scene portion beingor to be recorded being displayed on display 216, the device 200 (suchas by using the camera controller 212) may output for recording theprocessed second image stream (1404). The device 200 may then receive auser command to adjust the visual indication (1406). For example, thedevice 200 may receive from display 216 a user command provided by theuser through interacting with the display 216. In some exampleimplementations, the device 200 may receive a user command to adjust thesize of the visual indication (1408). Additionally or alternatively, thedevice 200 may receive a user command to move the location of the visualindication for the preview (1410).

With the device 200 to adjust the portion of the scene being recorded,the device 200 may adjust the visual indication so that the visualindication corresponds to the adjusted portion of the scene beingrecorded (1412). In response to the user command, the device 200 maydetermine if at least a portion of the scene for recording is outsidethe field of view in the second image stream (1414). For example, thedevice 200 determines if the scene portion 1304 (FIG. 13A) captured bythe second camera 204 does not include all of the scene 1308 forrecording. If the second image stream includes all of the scene 1308 forrecording, the device 200 continues to output for recording theprocessed second image stream (1404). For example, the camera controller212 adjusts the portion of the second image stream that is for recordingand continues to generate and output the processed second image streamfor recording.

If the second image stream does not include all of the scene forrecording (such as second camera 204 not capturing all of the sceneportion 1308 in FIG. 13A), the device 200 may switch from outputting forrecording the processed second image stream to outputting for recordingthe processed first image stream (1416). For example, the cameracontroller 212 may switch from outputting a portion of the processedsecond image stream to outputting a portion of the processed first imagestream corresponding to the scene portion 1308 in FIG. 13B. In somealternative implementations, the camera controller 212 may concurrentlyoutput both the processed first image stream and the processed secondimage stream. In this manner, the device 200 may determine to switchfrom using the processed second image stream for recording to using theprocessed first image stream for recording the portion of the scene.

In addition or alternative to a user requesting a change to the sizeand/or location of the visual indication (such as by user gestures onthe display 216 or other user inputs), the device 200 may automaticallyswitch from using the processed second image stream to using theprocessed first image stream for recording in response to one or morecriteria of the scene, device 200, and/or other components. In someexample implementations, a change in brightness may cause the device 200to switch image streams for recording. For example, a dual camera mayinclude a color camera and a black and white camera, wherein the blackand white camera has better fidelity in low light situations than thecolor camera. In this manner, the device 200 may determine to switchfrom using the color camera's image stream to using the black and whitecamera's image stream for recording if the brightness of the scene fallsbelow a threshold.

In some other example implementations, one or more of the cameras (suchas first camera 202 and second camera 204) may be moved such that theobject being tracked may fall outside the portion of the scene beingcaptured by one of the cameras. For example, if the first camera 202includes a wide view and the second camera 204 is a telephoto camera, aglobal motion in the first image stream and/or the second image streammay cause the object to go out of or about to go out of the field ofview of the second camera 204. As a result, the device 200 may switchimage streams from the second camera 204 to the first camera 202 forrecording in order to keep tracking the object. Similarly, the objectbeing tracked may move (a local motion) so that the second image streammight not include the object. The device 200 may switch from using thesecond image stream (which may be captured by a telephoto camera) tousing the first image stream (which may be captured by a wider field ofview camera).

FIG. 15 is an illustrative flow chart depicting an example operation1500 for switching from a processed second image stream to a processedfirst image stream for recording based on one or more criteria.Beginning at 1502, the device 200 may output for recording the processedsecond image stream. The device 200 may then determine a change in oneor more characteristics of the scene (1504). In one example, the device200 may optionally determine a change in brightness or luminance in atleast one of the image streams (1506). For example, the ambient lightintensity may be determined to fall below a threshold for the currentprocessed image stream being used for recording. In another example, thedevice 200 may optionally determine a global motion in at least one ofthe image streams (1508). For example, the second camera 204 may bemoved so that the first camera 202 is to be used to capture the portionof the scene for recording. In a further example, the device 200 mayoptionally determine a local motion of an object (1510). For example,the object being tracked by device 200 may move out of the field of viewof the second camera 204 so that the processed first image stream is tobe used for recording.

Based on changes to one or more characteristics of the scene, the device200 switches from outputting for recording the processed second imagestream to outputting for recording the processed first image stream(1512). In one example, the camera controller 212 may switch fromoutputting the processed second image stream for recording to outputtingthe processed first image stream for recording, where a portion of theprocessed first and/or second image streams may be stored for later use.In another example, the camera controller 212 may output both processedimage streams, and the device 200 may determine to switch from using theoutputted processed second image stream to using the outputted processedfirst image stream for recording.

In another example implementation of the device 200 automaticallyswitching between processed image streams for recording, an alien objectmay encroach on the portion of the scene being or to be recorded. Forexample, in recording a child's soccer game, a person sitting in frontof the father may suddenly enter the portion of the scene being or to berecorded (such as standing up, moving his or her head, and so on) sothat the device 200 is not recording (or outputting for recording) theintended portion of the scene. If the object blocks or obstructs a smallportion of the scene being recorded, the recording using the same imagestream may continue with limited interruptions. However, if the objectblocks or obstructs a large portion of the scene, the device 200 maydetermine to attempt using a different image stream for recording. Insome example implementations, the device 200 may switch to anotherprocessed image stream to attempt to capture the intended portion of thescene (such as if another camera has a different vantage of the portionof the scene not obstructed by the alien object or another camera has awider field of view so as to “zoom out” to capture the scene). Forexample, the device 200 may determine that a percentage of the portionof the scene is obstructed, may determine that an alien object is withina distance from the center of the scene being recorded, and so on.

FIG. 16 is an illustrative flow chart depicting an example operation1600 for switching from a processed second image stream to a processedfirst image stream for recording based on an object obstructing aportion of the scene being or to be recorded. Beginning at 1602, thedevice 200 may output for recording the processed second image stream.In one example, the camera controller 212 may output the processedsecond image stream for recording. In another example, the cameracontroller 212 may output multiple processed image streams, and thedevice 200 may use the processed second image stream for recording theportion of the scene.

With the processed second image stream being used for recording theportion of the scene, the device 200 may determine that an object movesto obstruct a portion of the scene being or to be recorded (1604). Thedevice 200 may then determine whether to switch from the processedsecond image stream to the processed first image stream based on theobject (1606). In one example, the device 200 may determine if theobject obstructs more than a percentage of the portion of the scenebeing or to be recorded. In another example, the device 200 maydetermine if the object is within a defined distance from obstructingthe center of the portion of the scene being or to be recorded. In afurther example, the device 200 may predict from the object's movementif the object is to obstruct a percentage of the portion of the scenefor recording or a center of the portion of the scene for recording. Ifthe device 200 determines to not switch processed image streams forrecording the portion of the scene, the device 200 continues to outputthe processed second image stream for recording the portion of the scene(1602). If the device 200 determines to switch processed image streamsfor recording the portion of the scene, the device 200 switches tooutputting the processed first image stream for recording the portion ofthe scene (1608).

Alternatively, if the camera controller 212 outputs both the processedfirst image stream and the processed second image stream, the device 200may switch from using the processed second image stream to using theprocessed first image stream for recording the portion of the scene. Insome example implementations, the device 200 may continue to track theobstructing object. If the obstructing object vacates the portion of thescene being or to be recorded, the device 200 may determine to switchprocessed image streams for recording. Alternatively, the device 200 maycontinue to use the current processed image stream for recording untilanother criterion causes the device to determine to switch usingprocessed image streams for recording.

The techniques described herein may be implemented in hardware,software, firmware, or any combination thereof, unless specificallydescribed as being implemented in a specific manner. Any featuresdescribed as modules or components may also be implemented together inan integrated logic device or separately as discrete but interoperablelogic devices. If implemented in software, the techniques may berealized at least in part by a non-transitory processor-readable storagemedium (such as the memory 208 in the example device 200 of FIG. 2 )comprising instructions 210 that, when executed by the processor 206 (orthe image signal processor 214), cause device 200 to perform one or moreof the methods described above. The non-transitory processor-readabledata storage medium may form part of a computer program product, whichmay include packaging materials.

The non-transitory processor-readable storage medium may comprise randomaccess memory (RAM) such as synchronous dynamic random access memory(SDRAM), read only memory (ROM), non-volatile random access memory(NVRAM), electrically erasable programmable read-only memory (EEPROM),FLASH memory, other known storage media, and the like. The techniquesadditionally, or alternatively, may be realized at least in part by aprocessor-readable communication medium that carries or communicatescode in the form of instructions or data structures and that can beaccessed, read, and/or executed by a computer or other processor.

The various illustrative logical blocks, modules, circuits andinstructions described in connection with the embodiments disclosedherein may be executed by one or more processors, such as the processor206 or the image signal processor 214 in the example device 200 of FIGS.2A and 2B. Such processor(s) may include but are not limited to one ormore digital signal processors (DSPs), general purpose microprocessors,application specific integrated circuits (ASICs), application specificinstruction set processors (ASIPs), field programmable gate arrays(FPGAs), or other equivalent integrated or discrete logic circuitry. Theterm “processor,” as used herein may refer to any of the foregoingstructures or any other structure suitable for implementation of thetechniques described herein. In addition, in some aspects, thefunctionality described herein may be provided within dedicated softwaremodules or hardware modules configured as described herein. Also, thetechniques could be fully implemented in one or more circuits or logicelements. A general purpose processor may be a microprocessor, but inthe alternative, the processor may be any conventional processor,controller, microcontroller, or state machine. A processor may also beimplemented as a combination of computing devices, e.g., a combinationof a DSP and a microprocessor, a plurality of microprocessors, one ormore microprocessors in conjunction with a DSP core, or any other suchconfiguration.

While the present disclosure shows illustrative aspects, it should benoted that various changes and modifications could be made hereinwithout departing from the scope of the appended claims. Additionally,the functions, steps or actions of the method claims in accordance withaspects described herein need not be performed in any particular orderunless expressly stated otherwise. For example, the steps of the exampleoperations illustrated in FIGS. 6, 8, 10, 12, and 14-16 , if performedby the device, camera controller, processor, or image signal processor,may be performed in any order and at any frequency (such as for everyimage capture, a periodic interval of image captures in a processedimage stream, a predefined time period, when user gestures are received,and so on). Furthermore, although elements may be described or claimedin the singular, the plural is contemplated unless limitation to thesingular is explicitly stated. For example, while two processed imagestreams are described, one processed image stream or three or moreprocessed image streams may be used in performing aspects of the presentdisclosure. Accordingly, the disclosure is not limited to theillustrated examples and any means for performing the functionalitydescribed herein are included in aspects of the disclosure.

What is claimed is:
 1. An apparatus for controlling a multicamerasystem, the apparatus configured to process and display image data, theapparatus comprising: memory configured to store the image data; atleast one processor in communication with the memory, the at least oneprocessor being configured to: receive a first image stream from a firstcamera, the first image stream having a first field of view (FOV) of ascene; receive a second image stream from a second camera, the secondimage stream having a second FOV of the scene different from the firstFOV of the scene; determine an object in the scene to be an object ofinterest; display a first preview of a first output image stream,wherein the first output image stream includes the first image streamalone, the second image stream alone, or both the first image stream andthe second image stream concurrently; determine a first metricindicative of motion associated with at least one of the first camera orthe second camera; determine a second metric indicative of motionassociated with the object of interest in the scene; and determine,based on the first metric and the second metric, whether to switch todisplay a second preview of a second output image stream, wherein thesecond output image stream is different from the first output imagestream.
 2. The apparatus of claim 1, wherein the at least one processoris further configured to: track the object of interest in the scene; anddetermine, based on tracking of the object of interest, the secondmetric indicative of motion associated with the object of interest. 3.The apparatus of claim 1, wherein the at least one processor is furtherconfigured to: determine, based on at least one of the first metric orthe second metric, that a portion of the object of interest has movedoutside of at least one the first FOV or the second FOV; and switch,based on the determination that the portion of the object of interesthas moved outside of at least one the first FOV or the second FOV, todisplay the second preview of the second output image stream.
 4. Theapparatus of claim 1, wherein the at least one processor is furtherconfigured to: determine, based on a comparison of at least one of thefirst metric or the second metric to a respective threshold, whether toswitch to display the second preview of the second output image stream.5. The apparatus of claim 1, wherein the first output image stream isthe first image stream alone, and wherein the second output image streamis the second image stream alone.
 6. The apparatus of claim 1, whereinthe first output image stream is both the first image stream and thesecond image stream concurrently, and wherein the second output imagestream is one of the second image stream alone or the first image streamalone.
 7. The apparatus of claim 1, wherein the second FOV is a portionof the first FOV, the portion of the first FOV being less than anentirety of the first FOV.
 8. The apparatus of claim 7, wherein the atleast one processor is further configured to: generate a visualindication on first image stream that indicates the portion of the firstFOV associated with the second FOV; and display the preview of the firstimage stream including the visual indication.
 9. The apparatus of claim1, further comprising: the first camera; the second camera; and adisplay configured to display the first preview and the second preview,wherein the first metric comprises a measure of global motion associatedwith at least one of the first camera or the second camera.
 10. Theapparatus of claim 9, wherein the apparatus is a wireless communicationsdevice.
 11. The apparatus of claim 9, wherein the apparatus is a virtualreality headset, an augmented reality headset, a drone, or automobile.12. The apparatus of claim 9, wherein the apparatus comprises a firstdevice and at least one second device, wherein the at least one seconddevice is separate from the first device, and wherein the first deviceincludes the memory, the at least one processor, and the display, andwherein the at least one second device includes the first camera and asecond camera.
 13. The apparatus of claim 12, wherein the first deviceis a wireless communications device and the at least one second deviceis a drone.
 14. The apparatus of claim 12, wherein the first device is awireless communications device and the at least one second device is asecurity camera.
 15. A method for controlling a multicamera system, themethod comprising: receiving a first image stream from a first camera,the first image stream having a first field of view (FOV) of a scene;receiving a second image stream from a second camera, the second imagestream having a second FOV of the scene different from the first FOV ofthe scene; determining an object in the scene to be an object ofinterest; displaying a first preview of a first output image stream,wherein the first output image stream includes the first image streamalone, the second image stream alone, or both the first image stream andthe second image stream concurrently; determining a first metricindicative of motion associated with at least one of the first camera orthe second camera; determining a second metric indicative of motionassociated with the object of interest in the scene; and determining,based on the first metric and the second metric, whether to switch todisplaying a second preview of a second output image stream, wherein thesecond output image stream is different from the first output imagestream.
 16. The method of claim 15, further comprising: tracking theobject of interest in the scene; and determining, based on tracking theobject of interest, the second metric indicative of motion associatedwith the object of interest.
 17. The method of claim 15, furthercomprising: determining, based on at least one of the first metric orthe second metric, that a portion of the object of interest has movedoutside of at least one the first FOV or the second FOV; and switching,based on the determination that the portion of the object of interesthas moved outside of at least one the first FOV or the second FOV, todisplaying the second preview of the second output image stream.
 18. Themethod of claim 15, further comprising: determining, based on acomparison of at least one of the first metric or the second metric to arespective threshold, whether to switch to display the second preview ofthe second output image stream.
 19. The method of claim 15, wherein thefirst output image stream is the first image stream alone, and whereinthe second output image stream is the second image stream alone.
 20. Themethod of claim 15, wherein the first output image stream is both thefirst image stream and the second image stream concurrently, and whereinthe second output image stream is the second image stream alone or thefirst image stream alone.
 21. The method of claim 15, wherein the secondFOV is a portion of the first FOV, the portion of the first FOV beingless than an entirety of the first FOV.
 22. The method of claim 21,further comprising: generating a visual indication on first image streamthat indicates the portion of the first FOV associated with the secondFOV; and displaying the preview of the first image stream including thevisual indication.
 23. The apparatus of claim 1, wherein the motionassociated with at least one of the first camera or the second cameraincludes one or more of panning, tilting, or rotating.
 24. The method ofclaim 15, wherein the motion associated with at least one of the firstcamera or the second camera includes one or more of panning, tilting, orrotating.
 25. A non-transitory, computer-readable storage medium havingstored thereon instructions that, when executed, cause a processor to:process a first image stream from a first camera, the first image streamhaving a first field of view (FOV) of a scene; process a second imagestream from a second camera, the second image stream having a second FOVof the scene different from the first FOV of the scene; determine anobject in the scene to be an object of interest; output a first previewof a first output image stream, wherein the first output image streamincludes the first image stream alone, the second image stream alone, orboth the first image stream and the second image stream concurrently;determine a first metric indicative of motion associated with at leastone of the first camera or the second camera; determine a second metricindicative of motion associated with the object of interest in thescene; and determine, based on the first metric and the second metric,whether to switch to output a second preview of a second output imagestream, wherein the second output image stream is different from thefirst output image stream.
 26. The non-transitory, computer-readablestorage medium of claim 25, further comprising instructions that causethe processor to: track the object of interest in the scene; anddetermine, based on tracking of the object of interest, the secondmetric indicative of motion associated with the object of interest. 27.The non-transitory, computer-readable storage medium of claim 25,further comprising instructions that cause the processor to: determine,based on at least one of the first metric or the second metric, that aportion of the object of interest has moved outside of at least one thefirst FOV or the second FOV; and switch, based on the determination thatthe portion of the object of interest has moved outside of at least onethe first FOV or the second FOV, to output the second preview of thesecond output image stream.
 28. The non-transitory, computer-readablestorage medium of claim 25, further comprising instructions that causethe processor to: determine, based on a comparison of at least one ofthe first metric or the second metric to a respective threshold, whetherto switch to output the second preview of the second output imagestream.
 29. The non-transitory, computer-readable storage medium ofclaim 25, wherein the second FOV is a portion of the first FOV, theportion of the first FOV being less than an entirety of the first FOV.30. The non-transitory, computer-readable storage medium of claim 29,further comprising instructions that cause the processor to: generate avisual indication on first image stream that indicates the portion ofthe first FOV associated with the second FOV; and output the preview ofthe first image stream including the visual indication.